javascript - Which format is better and not time consuming? -

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i new web development .. confused time complexity of java script , jquery other programming languages c , c++.

  format 1:     var cur_month;         cur_month = (new date().getmonth()) + 1;  // returns 0 11     cur_month = cur_month.tostring().length > 1 ? cur_month : '0' + cur_month;    format 2:     var cur_month;                 cur_month = ((new date().getmonth()) + 1).tostring().length > 1) ? ((new date().getmonth()) + 1) : '0' + ((new date().getmonth()) + 1);

in format 2 , accessing month 3 new date objects .. in first format , creating 1 object , accessing .. 1 better format?

format 1 because don't create multiple date object (with different values)

also rewrite last line.

adding string number implicitly casts string.

var cur_month;     cur_month = (new date().getmonth()) + 1; cur_month = ( cur_month < 10 ? '0' : '' ) + cur_month;

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